Electric-arc lamp



'3 Sheets-Sheet 1.

(NO 0, J. VAN DEPOELE.

ELECTRIC ARC LAMP. 5 Patented Mar. 4, 1884.

WITNESSES: INVENTOR W 4/ W M W Z v BY j m ATTORNEY.

N. PETERS. Piwlo-Lilhognpher. wng-ingmn. n c.

(No Model.) 4 r 3 SheetsSh .eet'2.

C. J. VAN DEPOELE! ELECTRIC ARC LAMP N 2941532- Patented Mar. 4; 1884.

WITNESSES: mvemoa BY v ATTORNEYS N. PETERS. Phulo-Lilhognphcr, Washinglon, n. c.

3 SheetsSheet 3,

(No Model.)

C. J. VAN DEPOELE ELECTRIC ARC LAMP.

Patent ed Mar. 4, 1884.

N. PETER5 PhohrLilhOgmpller. Wnihinglnn. D. C.

UNITED STATES A'fIiNT @rrrcn.

CHARLES J. VAN DEPOELE, OF CHICAGO, ILLINOIS.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No, 294,532, dated March 4:, 1884.

Application filed December 15, 1881. (No model.)

To all whom it may concern,-

Be it known that I, Crmnrns J. VAN Dn- POELE, of Chicago, in the county of Cook and State of Illinois, have invented an Improve ment in Electric-Arc Lamps, of which the following is a specification.

My invention relates to that class of electric lamps which are usually styled arc-lamps; and it consists in certain novel details of construction and arrangement, as will be fully hereinafter described.

In the accompanying drawings, which form a part of this specification, Figure l is an elevation of my lamp, with the front of the inclosing top case removed to show the working parts. Fig. 2 is an inverted plan view, showing the relative positions of the working parts. Fig. 3 is a detached inverted plan view of the lifter; and Fig. at is a diagrammatic view of the vibrating. devices, and it also shows the connect-ions between the main and shunt magnets and the relative positions of the several parts.

Similar letters denote like parts.

In the drawings, A is the lower and B the upper carbon; 0, the lower-carbon holder; D, the lower metallic frame; E, the upper one, forming or supporting an inclosing-case around the feeding devices placed therein, and although both frames form rigid construction mechanically, they are electrically disconnected in the usual way at a a, or other suitable points. In-

closed in the upper case, and placed in sym metrical positions in relation to theuppercarbons, are the two electro-magnets F and G, provided with the armature H, which is hinged at b, and connected with the other end at o by a link, I, to the. lifter J. This lifter J is hinged to the support d, and its construction is as follows: It consists of two like halves joined on the under side by an elastic plate or strap, 6, riveted or otherwisesecured thereto. Each of the inner ends of the two parts has a half-circular enlargement, forming, with the elastic plate, a circular clamp adapted to hold or release the upper carbon, in the manner hereinafter described.

K K are adjusting-screws stopping the downward movement of the lifter. Vhen not in operation, J being hinged at d, one half of it will naturally drop down on adjusting-screw K, and the other half will drop down on adj usting-screw K,which stands somewhat lower than K, and in this position, the jaw being opened, allows the upper carbon to drop down upon the lower carbon; but as soon as the lifter J is raised from its resting position the jaws close with the upper edge upon the carbon and hold it fast, carrying it upward with it. his a coil of fine wire wound upon the core M, and mounted upon the insulated base 0.

R and R are two vibrating armatures regulated by set-screws f and f, passing through posts g and 9.

Electrical connections are established as follows: P and N are the two posts to which the wires from the battery or dynamomachines are connected. The current entering at P passes through the upper frame to the top or positive carbon; then down said carbon to the lower one; hence to lower frame; from there it is carried by a proper electrical connection to a point marked 6, where it enters through the upper frame and is carried to the electromagnet F, comes out of said magnet on the inner side, and passes over to magnet G, and from there to the negative pole N, andthereby completes the circuit. It will be seen that the first or starting circuit of the lamp is from the frame E to the upper carbon, to thelower carbon, to the frame D, to the frame E, (at 6,) through the connection at 6 to both of the magnets F G, and out through the negative pole N. Further connections are made as follows: From 1 extends a conductor, which passes to a piece of the magnet-frame at 2, which is in metallic contact with the magnetcore M. From the core M at the point 4 the current passes (when the circuit is completed) to the vibrating armature R at thepoint 3; thence through wire 5, which connects with the main conductor at a point in advance of the main or carbon-controlling magnets F and G. The vibrating and fixed points 3 and 4 never make permanent contact, and this by-pass circuit through them being of low resistance causes the current flowing through the said main magnets to pulsate in accordance with the interruptions between the points 3 and 4, the main magnet being short-circuited it passes to said coil at 8, out at f), thence to vibrating circuit, interrupting armature It at 10, thence through adjustable. contactscrewf to post gatll, and is brought to the main circuit at 12, whence it passes to the negative binding-post N. The vibrations ot the armature It alternately make and break the abovedescribed circuit, from which it will be seen that the instant both the said armatures 'R 5t touch the core M the main magnets are shortcircuited and almost entirely demagnetized, releasing the upper-carbon-holding devices, while at the next instant the shunt-circuit is interrupted, the energy of the main magnets restored, and the descent of the carbon stopped. By the use of the zuljusting-screws ff these interruptions may he made to occur simultaneously or with greater frequency in either one or the other of the aforesaid circuits, so that the upper carbon will descend with a shaking motion, which, to secure steadiness in the light, must be practically continuous.

Having described the different parts of my lamp and the various electric connections, I. now proceed to explain its operation.

As soon as electric connection with the source is established, the magnetic cores F and G lift up the armature H, and at the same time the litter J, which has to partake in all its movements, and the latter, clamping the upper carbon, raises the same from its contact with the lower one, and thus establishes the are, but soon the carbons will wear away, so that it is necessary to feed the same down as fast as consumed, and this has to be done as, nicely as possible, in order to produce a steady light. Now, my device begins to operate as follows: The vibrating system, being electrically connectcd, will vibrate quietly and evenly at tirst that is, as long as the carbons are at their proper distance apart; but as the distance in creases, theincreased amount of currentsh untceases:

ed through the fine-wire coil L causes the \ibrations to become more energetic, and now it is that the second vibrating armature, lt, comes into action. This armature It will vibrate isochronously with the one marked It until its vibrations are energetic enough to make it (the vibratingarinaturclt) strilccthecorc M. This contact allows the current to be diverted from the magnets F G through the conductors 5 34. M21, instead of through the said magnets. The current through F (t-thns becomes pulsa tory, and when pulsations are well defined the armature ll will vibrate isochronously therewith, and by its connections with the lifter allow the top carbon to feed down gradually. \Vhen the proper distance of the carbons is obtained, the vibrating armatures lose power, and lit ceases to act until the carbons again need feeding.

The proper working of the vibrating armatures It It may be obtained by using a stiffer spring to support them,byplacing t-hema greator distance from the core, or in any other de sired manner.

Some oi the features shown and described in this application are shown, described, and claimed in Patent No. 291,653, granted to me January 8, 1881, and which a division of this case. I therefore layno claim in thisapplication to the features so claimed.

\Vhat I claim as my invention is It. In an electric-arc lamp, the combination of an. electroanagnet of relatively low resistance located in the main circuit, and having its armature connected to the carbon-rod clutch, and automatic vibrating circuit-breaking devices in circuit with an electro-magnet of high resistance located .in a shunt around the are, adapted to operate said circuit-breaking devices continuously, whereby the current pass ing through the main or feed-controlling magnets is rendered pulsatory, as set forth.

2. In an eleetricarc lamp, a litter, .1, made of two separate parts joined together at their middle by means 01' an elastic band or plate, substantially as described.

C IlIAltLlGS .T. VAN DEPOELE. \Vitnesses:

FJRA'N K Strmvan'r, Jenn Se U mm. 

